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ASTM D3265-23a

Historical Revision

Standard Test Method for Carbon Black—Tint Strength

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1.1 This test method covers the determination of the tint strength of carbon black relative to an industry tint reference black (ITRB).

1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.

1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.


4.1 For the broad range of commercial rubber grade carbon blacks, tint strength is highly dependent upon particle size. Tint strength can be used as an indication of particle size; however, tint strength is also dependent on structure and aggregate size distribution. Therefore, differences in tint strength within grades of carbon black may reflect differences other than particle size.

Note 1: This test method was developed primarily for the characterization of N100, N200, and N300 series carbon blacks.

4.2 Tint strength values within the carbon black industry have been developed using a Automatic Muller apparatus which is used to prepare carbon black-zinc oxide pastes. An alternative mixing apparatus, Hauschild SpeedMixer3,4 (DAC 150 FVZ), and a corresponding procedure have been extensively studied within D24 and shown to provide equivalent tint strength for all carcass or soft blacks and most tread blacks with the exception of higher surface area N100 types and specialty blacks. Therefore, it is the responsibility of the user of this alternate apparatus to ensure their products will adequately disperse. Disputes arising between a user and producer should be resolved using the Automatic Muller apparatus until ASTM develops adequate precision statements.

4.3 The term ITRB is used in the entire text for both, the original ITRB, used as the first reference material for tint testing, but which is now used up, and the successor reference material, ITRB2.

SDO ASTM: ASTM International
Document Number D3265
Publication Date Nov. 1, 2023
Language en - English
Page Count 6
Revision Level 23a
Supercedes
Committee D24.21
Publish Date Document Id Type View
June 15, 2024 D3265-24A Revision
Jan. 1, 2024 D3265-24 Revision
Nov. 1, 2023 D3265-23A Revision
Feb. 1, 2023 D3265-23 Revision
May 1, 2021 D3265-21 Revision
Nov. 1, 2019 D3265-19B Revision
Aug. 1, 2019 D3265-19A Revision
May 1, 2019 D3265-19 Revision
Sept. 1, 2017 D3265-17A Revision
May 1, 2017 D3265-17E01 Revision
May 1, 2017 D3265-17 Revision
Nov. 1, 2015 D3265-15A Revision
Jan. 1, 2015 D3265-15 Revision
June 1, 2014 D3265-14 Revision
Nov. 1, 2013 D3265-13A Revision
Jan. 1, 2013 D3265-13 Revision
May 1, 2011 D3265-11 Revision
July 1, 2007 D3265-07 Revision
Oct. 1, 2006 D3265-06 Revision
Dec. 1, 2005 D3265-05 Revision
July 10, 2003 D3265-03 Revision
Nov. 10, 2002 D3265-02 Revision
Dec. 10, 2001 D3265-01 Revision
Dec. 10, 2001 D3265-00 Revision